The partially eclipsed Super Blue Blood Moon is seen as it sets by St. Louis Cathedral in New Orleans, La. Wednesday, Jan. 31, 2018. The moon is a Supermoon because it is close to perigee, or its closest distance to Earth during the satellite's elliptical orbit around the planet, making it roughly 30,000 miles closer that when it is the furthest away or apogee. A Supermoon is brighter and larger in the night sky. When two full moons are seen in the same month like the one on January 1st and the 31st then that is called 'once in a blue moon.' The moon is never truly 100 percent full except during a lunar eclipse when the moon turns blood red. The moon did turn a reddish orange but was not fully eclipsed in New Orleans before it set near the time of sunrise.